Perhaps you should try some spelling variations:
xuat ban » luat ban, xuat san, thuat ban
te sach » toc sach
sach ky » sac ky, sach y, sach ty
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
nang ma » tang ma, sang ma, nang cao
anh vi » hanh vi, anh va, anh ve
vi cua » vai cua, di cua
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang ma) or (mang may)) hoi. hieu va cam ((xuat ban) or (duc van)) anh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang ma) OR (mang may)) hoi. hieu va cam ((xuat ban) OR (duc van)) anh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang ma) or (mang may)) hoi. hieu va cam ((xuat ban) or (duc van)) anh vi cua tre*.